Add Abstract, Introduction and Conclusion to the Inductors in DC Circuits Lab. Input calculationElectric Circuits Lab
Instructor: ———–
Lab
Inductors in DC Circuits
Student Name(s): Click or tap here to enter text.
Click or tap here to enter text.
Honor Pledge:
I pledge to support the Honor System of ECPI. I will refrain from any form of academic dishonesty or deception, such as cheating or plagiarism. I am aware that as a member of the academic community, it is my responsibility to turn in all suspected violators of the honor code. I understand that any failure on my part to support the Honor System will be turned over to a Judicial Review Board for determination. I will report to the Judicial Review Board hearing if summoned.
Date: 1/1/2018
Contents
Abstract 3
Introduction 3
Procedures 3
Data Presentation & Analysis 4
Calculations 4
Required Screenshots 4
Conclusion 4
References 5
Abstract
(This instruction box is to be deleted before submission of the Lab report)
What is an Abstract?
This should include a brief description of all parts of the lab. The abstract should be complete in itself. It should summarize the entire lab; what you did, why you did it, the results, and your conclusion. Think of it as a summary to include all work done. It needs to be succinct yet detailed enough for a person to know what this report deals with in its entirety.
Objectives of Week 2 Lab 1:
· Measure the resistance and Inductance.
· Use the Oscilloscope and Function generator.
· Measure the LR time constant using VR and VL.
· Understand the effect of series and parallel inductors on LR time constant.
Introduction
(This instruction box is to be deleted before submission of the Lab report)
What is an Introduction?
In your own words, explain the reason for performing the experiment and give a concise summary of the theory involved, including any mathematical detail relevant to later discussion in the report. State the objectives of the lab as well as the overall background of the relevant topic.
Address the following items in your Introduction:
· What is the time constant for an RL circuit and what is its significance?
· How do inductors combine in series? (Give formula)
· How do inductors combine in parallel? (Give formula)
· What is inductive reactance? (Give formula)
Procedures
1.
Construct the circuit shown in Figure 1 in Multisim. (You may either use the clock voltage of the function generator.)
Figure 1: RL Circuit
2.
Connect Channel A of the oscilloscope across the resistor and Channel B across the inductor.
3.
Set the voltage source to
5VPP; 300 Hz, Square wave, 50% duty cycle
4. You should be able to see the waveform as shown below. (Use Volts/Div and Time/DIV settings to adjust the signal)
Figure 2. Voltage across the inductor and resistor
5.
Calculate the time constant of an LR circuit. Record the result in
ELECTRIC CIRCUITS I
METRIC PREFIX TABLE
Metric
Prefix
Symbol
Multiplier
(Traditional Notation)
Expo-
nential
Description
Yotta
Y
1,000,000,000,000,000,000,000,000
1024
Septillion
Zetta
Z
1,000,000,000,000,000,000,000
1021
Sextillion
Exa
E
1,000,000,000,000,000,000
1018
Quintillion
Peta
P
1,000,000,000,000,000
1015
Quadrillion
Tera
T
1,000,000,000,000
1012
Trillion
Giga
G
1,000,000,000
109
Billion
Mega
M
1,000,000
106
Million
kilo
k
1,000
103
Thousand
hecto
h
100
102
Hundred
deca
da
10
101
Ten
Base
b
1
100
One
deci
d
1/10
10-1
Tenth
centi
c
1/100
10-2
Hundredth
milli
m
1/1,000
10-3
Thousandth
micro
µ
1/1,000,000
10-6
Millionth
nano
n
1/1,000,000,000
10-9
Billionth
pico
p
1/1,000,000,000,000
10-12
Trillionth
femto
f
1/1,000,000,000,000,000
10-15
Quadrillionth
atto
a
1/1,000,000,000,000,000,000
10-18
Quintillionth
zepto
z
1/1,000,000,000,000,000,000,000
10-21
Sextillionth
yocto
y
1/1,000,000,000,000,000,000,000,000
10-24
Septillionth
4-BAND RESISTOR COLOR CODE TABLE
BAND
COLOR
DIGIT
Band 1: 1st Digit
Band 2: 2nd Digit
Band 3: Multiplier
(# of zeros
following 2nd digit)
Black
0
Brown
1
Red
2
Orange
3
Yellow
4
Green
5
Blue
6
Violet
7
Gray
8
White
9
Band 4: Tolerance
Gold
± 5%
SILVER
± 10%
5-BAND RESISTOR COLOR CODE TABLE
BAND
COLOR
DIGIT
Band 1: 1st Digit
Band 2: 2nd Digit
Band 3: 3rd Digit
Band 4: Multiplier
(# of zeros
following 3rd digit)
Black
0
Brown
1
Red
2
Orange
3
Yellow
4
Green
5
Blue
6
Violet
7
Gray
8
White
9
Gold
0.1
SILVER
0.01
Band 5: Tolerance
Gold
± 5%
SILVER
± 10%
EET Formulas & Tables Sheet
Page
1 of
21
UNIT 1: FUNDAMENTAL CIRCUITS
CHARGE
Where:
Q = Charge in Coulombs (C)
Note:
1 C = Total charge possessed by 6.25×1018 electrons
VOLTAGE
Where:
V = Voltage in Volts (V)
W = Energy in Joules (J)
Q = Charge in Coulombs (C)
CURRENT
Where:
I = Current in Amperes (A)
Q = Charge in Coulombs (C)
t = Time in seconds (s)
OHM’S LAW
Where:
I = Current in Amperes (A)
V = Voltage in Volts (V)
R = Resistance in Ohms (Ω)
RESISTIVITY
Where:
ρ = Resistivity in Circular Mil – Ohm per Foot (CM-Ω/ft)
A = Cross-sectional area in Circular Mils (CM)
R = Resistance in Ohms (Ω)
ɭ = Length in Feet (ft)
Note:
CM: Area of a wire with a 0.001 inch (1 mil) diameter
CONDUCTANCE
Where:
G = Conductance in Siemens (S)
R Electric Circuits Lab
Inductors in DC Circuits
I.
Objectives:
After completing this lab experiment, you should be able to:
· Measure the resistance and Inductance.
· Use the Oscilloscope and Function generator.
· Measure the LR time constant using VR and VL.
· Understand the effect of series and parallel inductors on LR time constant.
II.
Parts List:
· Resistor (1) 5.1 kΩ
· Inductor (2) 100mH
III.
Procedures:
Part I:
1.
Construct the circuit shown in
Figure 1 in Multisim. (You may use either the clock voltage component or the function generator.)
PP
Figure 1: RL Circuit
2.
Connect Channel A of the oscilloscope across the resistor and Channel B across the inductor.
3.
Set the voltage source to
5VPP; 300 Hz, Square wave, 50% duty cycle
4. You should be able to see the waveform as shown below. (Use Volts/Div and Time/DIV settings to adjust the signal)
Figure 2. Voltage across the inductor and resistor
5.
Calculate the time constant of an LR circuit.
Record the result in
Table 1 below under the calculated value.
= L/R
Calculated value
Measured value using VL
Measured value using VR
Time constant ()
19.6 us
20.319 us
20.398 us
Table 1: Calculated and measured time constant values
6. Turn on the cursors on the oscilloscope
7.
Measuring the time constant with VL: (shown in Figure 3)
i.
Set Channel A to “0” to turn off Channel A signal.
ii.
Measure the peak value of the voltage across the resistor, by placing one of the cursors at the peak point _____5.002 V____.
iii.
Calculate the 37% of the above value ___1.85V______.
iv.
Place the second cursor at the voltage calculated above in step (iii).
v.
Observe the change in time (T2-T1) value on the scope, which is the value of one time constant.
vi.
Record the T2-T1 value in
Table 1 above under measured value using VL.
Figure 3: Measuring RL time constant using VL example (L = 150 mH)
Note: your scope screen will be different
8.
Set Channel B to “0” to turn it off.
9.
Set Channel A to “AC”
10. Adjust the Trigger settings, if needed, and you should be able to see the waveform as shown below. (Use Volts/Div and Time/DIV knobs to adjust the signal)
Figure 4: Voltage across the resistor
11.
Measuring the time constant: (shown in Figure 5)
i.
Measure the peak value of the signal, by placing one of the cursors (T1) at the peak point and the other cursor (T2) at the negative peak.
Calculate the total peak-to-peak voltage (T1-T2) _4.998V________.
ii.
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